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Note 10 - Fair Value Measurement (Tables) | 9 Months Ended
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Mar. 31, 2025
Notes Tables |
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block] |
|  | March 31, 2025 |
|  | Carrying |  |  | Fair Value Measured Using |  |  | Fair |
(In thousands) |  | Amount |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Value |
Available-for-Sale Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-Term Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual Funds - Corporate & Government Debt |  |  | 10,930 |  |  |  | 10,930 |  |  |  | — |  |  |  | — |  |  |  | 10,930 |
ETFs - Corporate & Government Debt |  |  | 7,127 |  |  |  | 7,127 |  |  |  | — |  |  |  | — |  |  |  | 7,127 |
Total Available-for-Sale Investments |  | $ | 18,057 |  |  | $ | 18,057 |  |  | $ | — |  |  | $ | — |  |  | $ | 18,057 |
|  | June 30, 2024 |
|  | Carrying |  |  | Fair Value Measured Using |  |  | Fair |
(In thousands) |  | Amount |  |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Value |
Available-for-Sale Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Short-Term Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mutual Funds - Corporate & Government Debt |  |  | 14,426 |  |  |  | 14,426 |  |  |  | — |  |  |  | — |  |  |  | 14,426 |
ETFs - Corporate & Government Debt |  |  | 7,048 |  |  |  | 7,048 |  |  |  | — |  |  |  | — |  |  |  | 7,048 |
Total Available-for-Sale Investments |  | $ | 21,474 |  |  | $ | 21,474 |  |  | $ | — |  |  | $ | — |  |  | $ | 21,474 |

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